Higuchi Kotarou is just a normal sixth grader - until an insanely perky angel named Misha moves in next door! Misha makes it her life's work to make Kotarou happy so she can pass her angel exams. Kotarou also has to cope with Misha's freaky roommates: a kind-hearted demon and her mysterious black cat. During autumn break, while Hiroshi is being dragged about and ordered around by his childhood friend Aoi, the Pita-Ten crew encounters two strange visitors from the Demon World - Kasumi and her ferret, Fia!